The researchers conceded that all participants received pharmaceutical treatment (e.g., with ACE inhibitors, angiotensin-receptor blockers, diuretic agents, calcium-channel blockers, beta-blockers, oral hypoglycemic drugs, insulin, statins and antiplatelet agents), which makes the ability to measure (additional) benefits of omega-3 fatty acids less evident. Moreover, a number of participants had already reported fish in their diets (43% consumed fish once a week, 27% consumed fish twice a week). Omega-3 fatty acid blood levels were not measured. Experts commented the publicly available scientific data taken altogether does demonstrate a cardiovascular benefit of eicosapentaenoic acid and docosahexaenoic acid in healthy populations, as well as in the majority of populations with pre-existing cardiovascular ailments; thus, the new results cannot be generalized.